From 8a33423ad6877fdb2bc1bc50c6506cff4ce9c5aa Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Mon, 16 Jan 2012 18:07:09 -0800
Subject: uhd: rev iq correction numbers format

---
 host/lib/usrp/common/apply_corrections.cpp   | 49 ++++------------------------
 host/lib/usrp/cores/rx_frontend_core_200.cpp |  4 +--
 host/lib/usrp/cores/tx_frontend_core_200.cpp |  4 +--
 3 files changed, 10 insertions(+), 47 deletions(-)

(limited to 'host/lib')

diff --git a/host/lib/usrp/common/apply_corrections.cpp b/host/lib/usrp/common/apply_corrections.cpp
index 6aee00753..b889266f2 100644
--- a/host/lib/usrp/common/apply_corrections.cpp
+++ b/host/lib/usrp/common/apply_corrections.cpp
@@ -54,7 +54,7 @@ static bool fe_cal_comp(fe_cal_t a, fe_cal_t b){
 
 static uhd::dict<std::string, std::vector<fe_cal_t> > fe_cal_cache;
 
-static std::complex<double> get_fe_dc_correction(
+static std::complex<double> get_fe_correction(
     const std::string &key, const double lo_freq
 ){
     const std::vector<fe_cal_t> &datas = fe_cal_cache[key];
@@ -81,36 +81,6 @@ static std::complex<double> get_fe_dc_correction(
     );
 }
 
-static std::complex<double> get_fe_iq_correction(
-    const std::string &key, const double lo_freq
-){
-    const std::vector<fe_cal_t> &datas = fe_cal_cache[key];
-    if (datas.empty()) throw uhd::runtime_error("empty calibration table " + key);
-
-    //search for lo freq
-    size_t lo_index = 0;
-    size_t hi_index = datas.size()-1;
-    for (size_t i = 0; i < datas.size(); i++){
-        if (datas[i].lo_freq > lo_freq){
-            hi_index = i;
-            break;
-        }
-        lo_index = i;
-    }
-
-    if (lo_index == 0) return std::complex<double>(datas[lo_index].iq_corr_real, datas[lo_index].iq_corr_imag);
-    if (hi_index == lo_index) return std::complex<double>(datas[hi_index].iq_corr_real, datas[hi_index].iq_corr_imag);
-
-    const std::complex<double> lo_val(datas[lo_index].iq_corr_real, datas[lo_index].iq_corr_imag);
-    const std::complex<double> hi_val(datas[hi_index].iq_corr_real, datas[hi_index].iq_corr_imag);
-
-    //interpolation time
-    return std::polar<double>(
-        linear_interp(lo_freq, datas[lo_index].lo_freq, std::abs(lo_val), datas[hi_index].lo_freq, std::abs(hi_val)),
-        linear_interp(lo_freq, datas[lo_index].lo_freq, std::arg(lo_val), datas[hi_index].lo_freq, std::arg(hi_val))
-    );
-}
-
 static void apply_fe_corrections(
     uhd::property_tree::sptr sub_tree,
     const uhd::fs_path &db_path,
@@ -155,15 +125,8 @@ static void apply_fe_corrections(
 
     }
 
-    if (file_prefix.find("dc_cal") != std::string::npos){
-        sub_tree->access<std::complex<double> >(fe_path)
-            .set(get_fe_dc_correction(cal_data_path.string(), lo_freq));
-    }
-    else if (file_prefix.find("iq_cal") != std::string::npos){
-        sub_tree->access<std::complex<double> >(fe_path)
-            .set(get_fe_iq_correction(cal_data_path.string(), lo_freq));
-    }
-    else throw uhd::runtime_error("could not determine interpolation function");
+    sub_tree->access<std::complex<double> >(fe_path)
+        .set(get_fe_correction(cal_data_path.string(), lo_freq));
 }
 
 /***********************************************************************
@@ -180,14 +143,14 @@ void uhd::usrp::apply_tx_fe_corrections(
             sub_tree,
             "dboards/" + slot + "/tx_eeprom",
             "tx_frontends/" + slot + "/iq_balance/value",
-            "tx_iq_cal_v0.1_",
+            "tx_iq_cal_v0.2_",
             lo_freq
         );
         apply_fe_corrections(
             sub_tree,
             "dboards/" + slot + "/tx_eeprom",
             "tx_frontends/" + slot + "/dc_offset/value",
-            "tx_dc_cal_v0.1_",
+            "tx_dc_cal_v0.2_",
             lo_freq
         );
     }
@@ -207,7 +170,7 @@ void uhd::usrp::apply_rx_fe_corrections(
             sub_tree,
             "dboards/" + slot + "/rx_eeprom",
             "rx_frontends/" + slot + "/iq_balance/value",
-            "rx_iq_cal_v0.1_",
+            "rx_iq_cal_v0.2_",
             lo_freq
         );
     }
diff --git a/host/lib/usrp/cores/rx_frontend_core_200.cpp b/host/lib/usrp/cores/rx_frontend_core_200.cpp
index d6396ef45..eb9f39fcf 100644
--- a/host/lib/usrp/cores/rx_frontend_core_200.cpp
+++ b/host/lib/usrp/cores/rx_frontend_core_200.cpp
@@ -64,8 +64,8 @@ public:
     }
 
     void set_iq_balance(const std::complex<double> &cor){
-        _iface->poke32(REG_RX_FE_MAG_CORRECTION, fs_to_bits(std::abs(cor) - 1, 18));
-        _iface->poke32(REG_RX_FE_PHASE_CORRECTION, fs_to_bits(std::arg(cor)/6.28318531, 18));
+        _iface->poke32(REG_RX_FE_MAG_CORRECTION, fs_to_bits(cor.real(), 18));
+        _iface->poke32(REG_RX_FE_PHASE_CORRECTION, fs_to_bits(cor.imag(), 18));
     }
 
 private:
diff --git a/host/lib/usrp/cores/tx_frontend_core_200.cpp b/host/lib/usrp/cores/tx_frontend_core_200.cpp
index b90281d9f..e35874173 100644
--- a/host/lib/usrp/cores/tx_frontend_core_200.cpp
+++ b/host/lib/usrp/cores/tx_frontend_core_200.cpp
@@ -62,8 +62,8 @@ public:
     }
 
     void set_iq_balance(const std::complex<double> &cor){
-        _iface->poke32(REG_TX_FE_MAG_CORRECTION, fs_to_bits(std::abs(cor) - 1, 18));
-        _iface->poke32(REG_TX_FE_PHASE_CORRECTION, fs_to_bits(std::arg(cor)/6.28318531, 18));
+        _iface->poke32(REG_TX_FE_MAG_CORRECTION, fs_to_bits(cor.real(), 18));
+        _iface->poke32(REG_TX_FE_PHASE_CORRECTION, fs_to_bits(cor.imag(), 18));
     }
 
 private:
-- 
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